TensorTools

A modern Fortran library for tensor calculus.

Getting started

The following instructions will give you a copy of the project up and running on your local machine. Notice, this library is only tested on Unix like operating systems (e.g. Linux, MacOs), Windows is not supported at the moment.

Download

To get the latest version of this package, you can easily clone this repository by using

git clone https://github.com/llamm-de/tensor_tools.git

Prerequisites & Dependencies

This package uses CMake for the creation of build files. In order to build this package yourself, you would need to have CMake installed on your system.

Some optional third party dependencies are:

• pFUnit (Optional) - To run the unit test for TensorTools
• Doxygen (Optional) - To automatically build the documentation of TensorTools
• LAPACK (Optional) - To use the more advanced and performance oriented algorithms in TensorTools

These dependencies are disabled by default. If you wish to use them, you can activate them by providing the options LIBTT_TESTS=ON, LIBTT_LAPACK=ON and/or LIBTT_DOCS=ON when running CMake.

Build & Installation

First create a build directory

mkdir build

within the directory you cloned TensorTools into. Next run Cmake to configure the build files, i.e.

cd build
cmake -DCMAKE_INSTALL_PREFIX=<path/to/install/dir> ..

Here, you have to specify the installation path explicitly. If you did not specify the path, the executable will be build into the build directory you just created.

Finally you can compile and install TensorTools by calling

make

Congratulations, now you should be able to include the installed library into your projects.

Include TensorTools into your project

There are various possibilities to include the tensor tools library into your own project. A few of them are listed below.

Use CMake

The most easy way to include TensorTools to your poject is available if your project is build using CMake.

Link against a static labrary

After having build the static library as described above, you only have to tell your linker where to find the libtt.a file.

Copy source files

If you do not want to care about setting up CMake or configuring your build link against a static library, you can also use the quick and dirty way by copying the source files directly into your projects source directory.

LAPACK routines

TensorTools offers some advanced and/or computational efficient routines which are based on the LAPACK library for linear algebra. The build of these routines is disabled by default. If you want to use them, you would need to set the corresponding option when running CMake, e.g.

cmake -DLIBTT_LAPACK=ON ..

Testing

If you want to run the tests for this framework, let CMake generate your build files and compile everything using

cmake -DLIBTT_TESTS=ON -DCMAKE_PREFIX_PATH=<path/to/pfunit/install/dir> ..
make

Now you can run the tests by calling

ctest

from the build directory.

Examples

You can find examples on the functionality of this library within the examples directory. To run an example, got to the directory of the desired example and run the prepared shell script, e.g.

./run_example.sh

This will build and execute the desired example for you.

Documentation

If you want to create a documentation for this framework, let CMake generate your build files and compile everything using

cmake -DLIBTT_DOCS=ON ..

Now you can create the documentation by calling

make docs

from the build directory.

Versioning

We use SemVer for versioning.

Contributing

If you wish to contribute to this project, feel free to report issues on GitHub or to even fork and open a pull request.

Main authors

• Lukas Lamm - Just some random guy working with computers

License & Copyright

This project is licensed under the LGPL License - see the LICENSE.md file for details.

Copyright © 2020 by Lukas Lamm